package com.zzg.quartz.util;

import java.util.Objects;
import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.JobBuilder;
import org.quartz.JobDataMap;
import org.quartz.JobDetail;
import org.quartz.JobKey;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.TriggerBuilder;
import org.quartz.TriggerKey;
import com.zzg.quartz.constants.ScheduleConstants;
import com.zzg.quartz.domain.SysJob;
import com.zzg.quartz.exception.TaskException;
import com.zzg.quartz.exception.TaskException.Code;

import lombok.extern.slf4j.Slf4j;

/**
 * 定时任务工具类
 *
 * @author zzg
 */
@Slf4j
public class ScheduleUtils {
	 private ScheduleUtils(){
	        throw new IllegalStateException("Utility class");
	    }

	    /**
	     * 获取触发器key
	     */
	    public static TriggerKey getTriggerKey(Long jobId) {
	        return TriggerKey.triggerKey(ScheduleConstants.TASK_CLASS_NAME + jobId);
	    }

	    /**
	     * 获取jobKey
	     */
	    public static JobKey getJobKey(Long jobId) {
	        return JobKey.jobKey(ScheduleConstants.TASK_CLASS_NAME + jobId);
	    }

	    /**
	     * 获取表达式触发器
	     */
	    public static CronTrigger getCronTrigger(Scheduler scheduler, Long jobId) {
	        try {
	            return (CronTrigger) scheduler.getTrigger(getTriggerKey(jobId));
	        } catch (SchedulerException e) {
	            log.error("getCronTrigger 异常：" , e);
	        }
	        return null;
	    }
	    
	    
	    /**
	     * 创建定时任务
	     */
	    public static void createScheduleJob(Scheduler scheduler, SysJob job) {
	        try {
	            // 构建job信息
	            JobDetail jobDetail = JobBuilder.newJob(ScheduleJob.class).withIdentity(getJobKey(job.getJobId())).build();

	            // 表达式调度构建器
	            CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(job.getCronExpression());
	            cronScheduleBuilder = handleCronScheduleMisfirePolicy(job, cronScheduleBuilder);

	            // 按新的cronExpression表达式构建一个新的trigger
	            CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity(getTriggerKey(job.getJobId()))
	                    .withSchedule(cronScheduleBuilder).build();

	            // 放入参数，运行时的方法可以获取
	            jobDetail.getJobDataMap().put(ScheduleConstants.TASK_PROPERTIES, job);

	            scheduler.scheduleJob(jobDetail, trigger);

	            // 暂停任务
	            if (job.getStatus().equals(ScheduleConstants.Status.PAUSE.getValue())) {
	                pauseJob(scheduler, job.getJobId());
	            }
	        } catch (SchedulerException | TaskException e) {
	            log.error("createScheduleJob 异常：" , e);
	        }
	    }

	    /**
	     * 更新定时任务
	     */
	    public static void updateScheduleJob(Scheduler scheduler, SysJob job) {
	        try {
	            TriggerKey triggerKey = getTriggerKey(job.getJobId());

	            // 表达式调度构建器
	            CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(job.getCronExpression());
	                cronScheduleBuilder = handleCronScheduleMisfirePolicy(job, cronScheduleBuilder);


	            CronTrigger trigger = getCronTrigger(scheduler, job.getJobId());

	            // 按新的cronExpression表达式重新构建trigger
	            trigger = Objects.requireNonNull(trigger).getTriggerBuilder().withIdentity(triggerKey).withSchedule(cronScheduleBuilder).build();

	            // 参数
	            trigger.getJobDataMap().put(ScheduleConstants.TASK_PROPERTIES, job);

	            scheduler.rescheduleJob(triggerKey, trigger);

	            // 暂停任务
	            if (job.getStatus().equals(ScheduleConstants.Status.PAUSE.getValue())) {
	                pauseJob(scheduler, job.getJobId());
	            }

	        } catch (SchedulerException | TaskException e) {
	            log.error("SchedulerException 异常：" , e);
	        }
	    }

	    /**
	     * 立即执行任务
	     */
	    public static int run(Scheduler scheduler, SysJob job) {
	        int rows = 0;
	        try {
	            // 参数
	            JobDataMap dataMap = new JobDataMap();
	            dataMap.put(ScheduleConstants.TASK_PROPERTIES, job);

	            scheduler.triggerJob(getJobKey(job.getJobId()), dataMap);
	            rows = 1;
	        } catch (SchedulerException e) {
	            log.error("run 异常：" , e);
	        }
	        return rows;
	    }

	    /**
	     * 暂停任务
	     */
	    public static void pauseJob(Scheduler scheduler, Long jobId) {
	        try {
	            scheduler.pauseJob(getJobKey(jobId));
	        } catch (SchedulerException e) {
	            log.error("pauseJob 异常：" , e);
	        }
	    }

	    /**
	     * 恢复任务
	     */
	    public static void resumeJob(Scheduler scheduler, Long jobId) {
	        try {
	            scheduler.resumeJob(getJobKey(jobId));
	        } catch (SchedulerException e) {
	            log.error("resumeJob 异常：" , e);
	        }
	    }

	    /**
	     * 删除定时任务
	     */
	    public static void deleteScheduleJob(Scheduler scheduler, Long jobId) {
	        try {
	            scheduler.deleteJob(getJobKey(jobId));
	        } catch (SchedulerException e) {
	            log.error("deleteScheduleJob 异常：" , e);
	        }
	    }

	    private static CronScheduleBuilder handleCronScheduleMisfirePolicy(SysJob job, CronScheduleBuilder cb)
	            throws TaskException {
	        switch (job.getMisfirePolicy()) {
	            case ScheduleConstants.MISFIRE_DEFAULT:
	                return cb;
	            case ScheduleConstants.MISFIRE_IGNORE_MISFIRES:
	                return cb.withMisfireHandlingInstructionIgnoreMisfires();
	            case ScheduleConstants.MISFIRE_FIRE_AND_PROCEED:
	                return cb.withMisfireHandlingInstructionFireAndProceed();
	            case ScheduleConstants.MISFIRE_DO_NOTHING:
	                return cb.withMisfireHandlingInstructionDoNothing();
	            default:
	                throw new TaskException("The task misfire policy '" + job.getMisfirePolicy() + "' cannot be used in cron schedule tasks" , Code.CONFIG_ERROR);
	        }
	    }


}
